exam Maths Puzzle Numerical Ability

Solve for angle &#952; to the nearest degree, 0 degrees <(or equal to)&#952; < (or equal to) 90 degrees

a) sin &#952; = 1/2
b) tan &#952; = square root 3
b) cos &#952; = 0.253

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exam Other Question
This is another question that has me confused. Your explanation or steps would be helpful to solve my other equations. thanks

(x^2y^-1m^-3)^3
____________
2p^-4

thank you Hello, I am in deep need of help. I am suppose to use the sqrt property to solve equation.
(a-2)^2=8
Thanks for anyone that can help.